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A total of 152 Salmonella isolates recovered from retail foods in Henan Province in China were characterized using serotyping and antimicrobial susceptibility testing. Nalidixic acid and/or ciprofloxacin-resistant isolates were further examined for amino acid substitution of gyrase and topoisomerase Ⅳ, and for the presence of qnr (qnrA, qnrB and qnrS) and aac(6′)-Ib genes. Selected serovars were subtyped...
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